1.      Fourier analysis is used to

a.       Convert between time and frequency domain

b.      Determine the period of a sound

c.       Align the phases of multiple sinusoids

d.      B and C

 

2.      What is the result of adding 2 sinusoids with unequal frequency?

a.       A sinusoid of the higher frequency

b.      A sinusoid of the lower frequency

c.       A periodic complex tone

d.      A sinusoid of a different frequency

 

3.      The call of the Tasmanian Devil has an Intensity Level of 72 dB IL. I encounter a group of Tasmanian Devils gathering on a Saturday afternoon in Sydney, Australia. When they sound their calls simultaneously, I record a level around 102 dB IL. Approximately how many Tasmanian Devils are in attendance.

a.       30

b.      100

c.       1,000

d.      10,000

 

4.      If the intensity of sound A is 16 times the intensity of sound B, then the difference is

a.       +12

b.      +16

c.       +30

d.      +32

 

5.      Halving (dividing by 2) the pressure of a sound corresponds to a change of ___

a.       +3 dB

b.      -6 dB

c.       +6 dB

d.      -3 dB

 

6.      A sound recording engineer needs to reduce the level of bell sounds in a recording (sampled at 44,100 Hz). Most of the bell sound is in frequency region between 6,000-9,000 Hz. What type of filter could the engineer use to reduce the amplitude of these frequencies?

a.       Low-pass

b.      High-pass

c.       Band-pass

d.      Band-pass

e.       Band-stop

 

7.      The speed of sound depends on

a.       The frequency of the medium

b.      The elasticity of the medium

c.       The density of the medium

d.      A and B

e.       A and C

f.       B and C

g.      A, B and C

 

 

 

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Status NEW Posted 29 Aug 2017 04:08 PM My Price 10.00

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